In the fourth episode, Jerry begins with a bit more highlighting on the rock formations with #4 chisel-edge brush to create more interest and shading. Next Jerry adds small bushes and foliage to create the nice, spring-time look. Now Jerry sketches in a few places where he wants cactus; then with the #4 chisel-edge brush inserts shapes of the cactus being careful not to leave hard lines - rather soft edges. Next Jerry illustrates how to insert the grooves in the cactus. Now Jerry begins adding a variety of flowers.